I like your concept, but I don't feel that it will be practical for the
situation in which I want to use it.
I have this data binding working on a tool bar, which I can define
completely with MXML... (detailed below).
Note that some of the names have changed since my last post, but you can
see since I have a complete MXML implementation, using no ActionScript.
This allows me to insert using the curly-brace notation for data binding
directly to the ModelLocator. This method works fine, and I have for the
moment installed a temporary button that toggles the state of some of
these ACTION_ENABLED variables and have verified that this works
wonderfully.
Perhaps there is a way to define a MenuBar completely in MXML, to allow
this data binding option also? I'm not certain since the documentation
for MenuBars varies depending on where you are reading it.
Regards,
Graham Weldon
================================================================
<mx:Canvas
xmlns:mx="http://www.adobe.com/2006/mxml"
styleName="myToolbar">
<!-- ================================= -->
<!-- ================= FILE OPERATIONS -->
<mx:LinkButton
styleName="myToolbarButton"
id="toolbar_fileNew"
toolTip="New"
icon="@Embed('images/icons/ck_6.gif')"
disabledIcon="@Embed('images/icons/ck_6_off.gif')"
width="25"
height="25"
enabled="{ModelLocator.getInstance().ACTION_ENABLED__FILE_NEW}"
x="0"/>
<mx:LinkButton
styleName="myToolbarButton"
id="toolbar_fileOpen"
toolTip="Open"
icon="@Embed('images/icons/ck_1.gif')"
disabledIcon="@Embed('images/icons/ck_1_off.gif')"
width="25"
height="25"
enabled="{ModelLocator.getInstance().ACTION_ENABLED__FILE_OPEN}"
x="25"/>
<!-- ================================= -->
</mx:Canvas>
================================================================
Tim Hoff wrote:
> Yeah, I was afraid of that. You would probably have to dispatch an
> event that is listened for by the view, when you want to
> enable/disable menu options. The listening function would do
> something like this:
>
> private function enableMenuItems(mb:MenuBar):void
> {
> for (var i:int = 0; i < 2; i++)
> {
> mb.getMenuAt(i).enabled =
> ModelLocator.getInstance().enabledMenuArray(i).enabledValue;
> }
> }
>
> Not true binding, but it might work. This code has errors, but you
> get the idea. Just brainstorming.
>
> -TH
>
> --- In flexcoders@yahoogroups.com, Graham Weldon <[EMAIL PROTECTED]>
> wrote:
> >
> > Hi Tim,
> >
> > Curly braces dont work for data binding within ActionScript in the
> > manner you suggest:
> > * Expecting colon before dot.
> > * Syntax Error: rightbrace is unexpected.
> > * Expecting rightbrace before semicolon.
> >
> > Those are the compile errors encountered. Perhaps there is another
> wya
> > to use dataBinding from ActionScript? Or alternatively, there may
> be a
> > way to completely define this component in MXML, allowsin us to
> use the
> > curly-brace notation for databinding?
> >
> > Regards,
> > Graham Weldon
> >
> >
> >
> >
> > Tim Hoff wrote:
> >
> > > Did you try this: (curly braces for binding)
> > >
> > > <menuItem label="New" enabled="' +
> > > { ModelLocator.getInstance
> ().ACTION_ENABLED_FILE_NEW }
> > > + '"/>
> > >
> > > --- In flexcoders@yahoogroups.com, "Graham Weldon"
> > > <graham.weldon@> wrote:
> > > >
> > > > I've asked this question previously, but in a slightly
> different
> > > > manner, and since its post, I ahve managed to make some
> progress.
> > > >
> > > > I have created a new MXML component that represents a MenuBar
> with
> > > > some items within that will not change except for their enabled
> > > value.
> > > > I am building this on top of the Cairngorm framework 2.0 beta,
> > > which
> > > > means I'm taking advantage of the ModelLocator construct.
> > > >
> > > > I have a collection of ENABLED indicators stored on the
> > > ModelLocator,
> > > > which will be changed at varying points in the programs
> execution.
> > > > These states need to enable and disable the options in the
> menu.
> > > >
> > > > Here is a snippet of what I am using, which works great for
> > > indicating
> > > > the initial required enabled or disabled state, but does not
> > > update as
> > > > the variables change...
> > > >
> > > > Any thoughts on how to restructure this to allow the options to
> > > update
> > > > in real time with data binding, rather than being set upon
> > > > instantiation and initialisation of the component.
> > > >
> > > > Thanks in advance!
> > > >
> > > > Regards,
> > > > Graham Weldon
> > > >
> > > >
> > > > ==============================================
> > > >
> > > > import mx.collections.XMLListCollection;
> > > >
> > > > [Bindable]
> > > > private var menuXML : XMLListCollection = new
> > > > XMLListCollection(rawMenuXML);
> > > > [Bindable]
> > > > private var rawMenuXML : XMLList = XMLList(
> > > > '<menuItem label="File" enabled="' +
> > > > ModelLocator.getInstance().ACTION_ENABLED_FILEMENU
> + '">' +
> > > >
> > > > '<menuItem label="New" enabled="' +
> > > > ModelLocator.getInstance().ACTION_ENABLED_FILE_NEW
> > > + '"/>' +
> > > > '<meunItem label="Open" enabled="' +
> > > > ModelLocator.getInstance().ACTION_ENABLED_FILE_OPEN
> > > + '"/>' +
> > > >
> > > > '</menuItem>'
> > > > );
> > > >
> > > >
> > > >
> > > > <mx:MenuBar
> > > > labelField="@label"
> > > > xmlns:mx="http://www.adobe.com/2006/mxml"
> > > > dataProvider="{menuXML}"/>
> > > >
> > > > ==============================================
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
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